EP2241773A2 - Palier lisse - Google Patents

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Info

Publication number: EP2241773A2
Authority: EP; European Patent Office
Prior art keywords: plastic material; bearing according; sliding bearing; ptfe; fully fluorinated
Prior art date: 2009-04-17
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.): Granted

Application number

EP10158124A

Other languages

German (de)

English (en)

Other versions

EP2241773B1 (fr

EP2241773A3 (fr

Inventor

Michael Schlipf

Claudia Stern

Dennis Wagner

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

ElringKlinger AG

Original Assignee

ElringKlinger AG

Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)

2009-04-17

Filing date

2010-03-29

Publication date

2010-10-20

2010-03-29 Application filed by ElringKlinger AG filed Critical ElringKlinger AG

2010-10-20 Publication of EP2241773A2 publication Critical patent/EP2241773A2/fr

2013-02-13 Publication of EP2241773A3 publication Critical patent/EP2241773A3/fr

2016-07-20 Application granted granted Critical

2016-07-20 Publication of EP2241773B1 publication Critical patent/EP2241773B1/fr

Status Active legal-status Critical Current

2030-03-29 Anticipated expiration legal-status Critical

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Classifications

- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/20—Sliding surface consisting mainly of plastics
- F16C33/201—Composition of the plastic

Definitions

the invention relates to a sliding bearing, in particular for use as a dry running sliding bearing, with a bearing body in which a bearing bush is formed, whose surface is at least partially made of a plastic material.
the sliding partner of the plain bearing usually a shaft, is often made of either plastic or metal, often hardened steel.
Frictionally relative to each other moving material pairings are generally subject to friction and wear.
the two main factors influencing solid-state friction are adhesion and deformation in the contact surface. Accordingly, the coefficient of friction is made up of an adhesive proportion proportional to the real contact area and the higher the polarity and the smoother the surface is, and a deformative proportion, the higher the roughness and thus the penetration depth, together.
the sliding surface often has a higher temperature than the entire bearing. While the sliding surface determines the friction coefficient and the wear as the place of heat generation, the bearing temperature determines primarily the mechanical load capacity of the sliding couple.
Conventional sliding bearings which are designed for high loads, are often prepared using PTFE, optionally compounded with high-performance thermoplastics, wherein in addition more lubricants, such as BN or MoS 2 , may be included in the compound.
high-performance thermoplastics PEEK, PPS or PA are frequently used in conjunction with PTFE.
fillers for example glass, bronze and carbon particles
Some typical materials based on standard PTFE and chemically modified PTFE are listed in Table 1.
the cold flow values given in Table 1 were determined at 23 ° C., at a pressure load of 15 N / mm 2 , during 100 h and after 24 h pressure release.
Teflon® 701 from DuPont, which is chemically modified PTFE a PTFE copolymer having a PPVE comonomer content of 0.15% by weight.
the object of the invention is to provide a sliding bearing, in which the performance, especially during dry running, is increased and tolerates especially in these conditions, higher than usual sliding speeds over long periods of operation.
thermoplastic polymer materials which differ from chemically modified PTFE initially by a higher and optionally also different comonomer content and only slightly lower melting points, significantly improved cold flow properties, further surprisingly accompanied by drastically improved wear properties.
Moldflon ® materials with PPVE comonomer contents of 0.2 to 1 mol% a melting point 323-315 ° C compared to 327 ° C for standard and chemically modified PTFE.
the application temperature for Moldflon ® materials can still be 250 ° C and above.
plain bearings according to the invention can occupy applications that were the previous slide bearings based on standard PTFE and chemically modified PTFE closed.
TFE copolymers in which the comonomer is present with a minimum proportion of 0.2 mol% are suitable as fully fluorinated thermoplastic synthetic materials.
the comonomer is preferably selected from hexafluoropropylene, perfluoroalkyl vinyl ether, perfluoro (2,2-dimethyl-1,3-dioxole) and chlorotrifluoroethylene.
Copolymers of TFE with chlorotrifluoroethylene are also subsumed in the context of the present invention under fully fluorinated plastic materials, since the halogen content other than fluorine is comparatively low.
a polyalkyl vinyl ether-type comonomer frequently used in the invention is perfluoropropyl vinyl ether (PPVE). With this comonomer, proportions of less than 3.5 mol% are recommended, since the PTFE properties are largely retained and thermoplastic processing is nevertheless possible. More preferably, the comonomer content is limited to less than about 3 mole percent, even more preferred are comonomer levels of less than about 2.5 mole percent, for example, 1 mole percent or less or 0.5 mole percent or less ,
thermoplastically processable PTFE also known as melt-processable PTFE or short m-PTFE, used.
melt-processable PTFE also known as melt-processable PTFE or short m-PTFE.
materials are in the WO 01/60911 and the WO 03/078481 describe.
PFA is a suitable fully fluorinated thermoplastically processable plastic material in the context of the present invention.
Polymer blends of PTFE and one or more further thermoplastically processable fluorinated plastics are used in addition to the above-described TFE copolymers, as fully bleached, in particular fully fluorinated, plastic material to be used according to the invention.
PTFE micropowders These are PTFE grades with low molecular weight and low melt viscosity compared to high molecular weight (standard) PTFE. They are typically prepared either by emulsion polymerization, by thermomechanical degradation of high molecular weight PTFE in the extruder, or by jet degradation of high molecular weight PTFE, followed by a milling process.
Preferred plastic materials which can be used according to the invention may contain additives, in particular in proportions of up to 60% by weight, based on the total mass of the plastic material. Particularly preferred plastic materials which can be used according to the invention contain up to 40% by weight of additives.
Typical lower limits for additives are about 0.5% by weight.
the lower limit for this type of additive is typically about 0.01% by weight.
the upper limit for dye fractions in the plastic material is typically about 3% by weight.
additives are both organic and inorganic fillers.
the fillers may be present in particular in fiber form, granular or in needle form.
Such plastic materials used in the invention have improved mechanical properties due to the filler, while the advantageous properties of the fully fluorinated polymer material do not degrade to any extent when the levels of fillers are within the limits outlined above.
Compounds used in the plain bearings according to the invention are those which are fully fluorinated thermoplastic polymer material and one or more comprise further high-performance thermoplastics, the proportion of other high-performance polymers in the total mass of the compound used in the invention is preferably 3 wt .-% or more. Below such a proportion, the property improvement is sometimes not particularly pronounced.
the proportion of the fully fluorinated thermoplastically processable polymer in the total mass of the compound should preferably be 3% by weight or more. This ensures that the sliding properties of the fully fluorinated polymer material are still appreciable.
the compound Due to the selection of the PTFE component as fully halogenated, in particular fully fluorinated thermoplastic polymer material, the compound can be obtained with great homogeneity in the microstructure.
the compound which can be used according to the invention is essentially free of PTFE island structures.
composition of the compounds which can be used according to the invention can be varied within a wide range with regard to the proportions of fully fluorinated thermoplastic polymer material, in particular melt-processable PTFE, and the one or more high-performance polymer component (s).
the compounds which can be used according to the invention exhibit considerably improved mechanical properties compared with the conventional PTFE compounds.
compounds which can be used in accordance with the invention and contain a high proportion of further high-performance polymer and a low proportion of thermoplastically processable PTFE can be produced with a high elongation at break, i. Elongation at break values of, for example, 20% and more, more preferably 30% and more.
the specified elongation at break values correspond to values from tests in accordance with DIN EN ISO 527-1 using test specimens Type V in accordance with ASTM D-638.
PTFE materials especially standard PTFE, have inherently far higher elongation at fracture than the other high performance polymers. But here as well, with increasing proportions thereof in the compound, a drastic drop in the elongation at break values is observed.
the compounds which can be used according to the invention given the same ratios of proportions of fully fluorinated polymer material to further high-performance polymer, in particular also PI or PPS, have significantly better elongation at break values, which are of great importance in a large number of plain bearing applications.
the compounds which can be used according to the invention are suitable for producing high-temperature-resistant components which exhibit favorable fire behavior. Such components are of great interest in aircraft construction.
the compounds which can be used according to the invention are also outstandingly suitable for injection molding production, with the high mechanical strength of the components obtained in particular being advantageous over compressive and tensile loads.
the higher compressive strength in the long-term pressure load both at room temperature and at temperatures up to 250 ° C is a great advantage.
compounds which can be used according to the invention can be produced with improved slip properties, on the one hand avoiding a stick-slip effect and, on the other hand, the coefficient of friction being very low, in particular in the compounds according to the invention with a high proportion of melt-processable PTFE.
V 0.6 m / s and a load perpendicular to the sliding direction of 0.5 to 1.5 N / mm 2 friction coefficients in the range of 0.1 to 0.3 are possible.
components from the compounds which can be used according to the invention are also suitable for higher specific surface pressures, they show a less abrasion and thus a longer life. Again, there is an important property for plain bearing applications.
thermoplastic polymer materials in particular m-PTFE
advantages of the compounds according to the invention with fully fluorinated thermoplastic polymer materials, in particular m-PTFE apply in comparison with compounds which contain standard PTFE or chemically modified, high molecular weight PTFE at the same percentage composition as a fully fluorinated component.
the compounds which can be used according to the invention are preferably prepared by way of melt compounding.
the plastic material Moldflon ® MF10005 is called an m-PTFE weight with a comonomer content of 1.7.% Of the comonomer PPVE.
the melt flow rate MFR (372/5) is 5 g / 10 min.
the test apparatus 10 of FIG. 1 includes a bearing block 12 with a bearing seat 14 that extends through the entire bearing block 12 therethrough.
the bearing receptacle 14 has at its lower end 16 on a projection 18 which forms a support for a stock used in the bearing receptacle 14 slide bearing sleeve 20.
the plain bearing sleeve has a wall thickness of 1 mm.
the height of the plain bearing sleeve is 6 mm.
the free diameter of the plain bearing sleeve is 10 mm.
the plain bearing sleeve 20 receives a shaft 22 which has a diameter of 10 mm and is made of stainless steel (type X210Cr12).
the plain bearing sleeve 20 is made of a piece of film 24 (see. FIG. 2 ), which consists of a melt extruded, 1 mm thick film of Moldflon ® MF10005 in the in FIG. 2 punched parallelogram shape is formed, formed by rolling and then inserted into the bearing receptacle 14.
the slide bearing thus produced has no signs of wear even after 2 weeks of continuous operation.
a piece of film having the same dimensions as in the above example was punched out from a film of a sintered standard PTFE material ( Teflon® 701 from DuPont) with a thickness of 1 mm, rolled up and also tested as a plain bearing sleeve in the test Test apparatus 10 subjected.
the test conditions were the same as in the plain bearing according to the invention. After 2 weeks of continuous operation, the plain bearing was worn so far that it had to be replaced.
Example 3 compares the results of wear tests of plastic materials based on standard PTFE (sample a) and m-PTFE (sample b) with different carbon fiber contents. As m-PTFE Moldflon® MF10005 was used.
test specimens are plastic material pins with a diameter of 10 mm. These are pressed with a force of 0.42 N / mm 2 against a disc made of stainless steel (X210Cr12). The surface roughness Rz of the steel disc was 2 ⁇ m. The temperature of the steel disc was 100 ° C, the relative speed was 4 m / s. The test duration was 100 h each. Test atmosphere: air. The test was carried out in accordance with DIN ISO 7148-2.
the test results for carbon fiber contents of 10 to 20% by weight are from the graph of FIG. 3 seen.
Example 4 the results of wear tests of plastic materials in the form of standard PTFE (sample a), modified PTFE (sample b) and m-PTFE (Moldflon MF10005 ®) (sample c) are compared.
the test piece used is a pin with a diameter of 10 mm. It is pressed with a force of 0.21 N / mm 2 onto a shaft made of stainless steel (X210Cr12) with a roughness depth Rz of 1.91 ⁇ m.
the sliding speed in the test between shaft and pin was 4 m / s, the test atmosphere is air, the test temperature 100 ° C.
the test was carried out in accordance with DIN ISO 7148-2.
test results for a test duration of 1 h are the graph of the FIG. 4 refer to.

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Engineering & Computer Science (AREA)
General Engineering & Computer Science (AREA)
Mechanical Engineering (AREA)
Sliding-Contact Bearings (AREA)
Compositions Of Macromolecular Compounds (AREA)
Manufacture Of Macromolecular Shaped Articles (AREA)

EP10158124.7A 2009-04-17 2010-03-29 Palier lisse Active EP2241773B1 (fr)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
DE102009018637A DE102009018637A1 (de)	2009-04-17	2009-04-17	Gleitlager

Publications (3)

Publication Number	Publication Date
EP2241773A2 true EP2241773A2 (fr)	2010-10-20
EP2241773A3 EP2241773A3 (fr)	2013-02-13
EP2241773B1 EP2241773B1 (fr)	2016-07-20

Family

ID=42667930

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP10158124.7A Active EP2241773B1 (fr)	2009-04-17	2010-03-29	Palier lisse

Country Status (4)

Country	Link
US (1)	US20100290726A1 (fr)
EP (1)	EP2241773B1 (fr)
CN (1)	CN101865212B (fr)
DE (1)	DE102009018637A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US10670101B2 (en)	2015-06-29	2020-06-02	Saint-Gobain Performance Plastics Corporation	Linear motion system

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* Cited by examiner, † Cited by third party
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DE102009014974A1 (de) *	2009-03-18	2010-09-23	Elringklinger Ag	Polymercompound sowie Bauteile, hergestellt unter Verwendung des Compounds
FR2985215B1 (fr)	2011-12-28	2014-09-19	Saint Gobain Performance Plast	Revetements polymeres deposes sur des substrats par des techniques de projection thermique
CN103182808A (zh) *	2011-12-28	2013-07-03	圣戈班高功能塑料集团	一种包括含氟聚合物表面层以及非氟聚合物过渡层的多层复合物
DE102012006190A1 (de) *	2012-03-27	2013-10-02	Minebea Co., Ltd.	Spindelmotor mit einem fluiddynamischen Lager und einem beschichteten Bauteil und Verfahren zur Beschichtung eines solchen Bauteils
EP2867019B1 (fr)	2012-06-29	2023-01-18	Saint-Gobain Performance Plastics Pampus GmbH	Palier lisse comprenant un systeme d'amorcage comme agent adhesif
CN108240335B (zh)	2012-07-23	2019-09-20	艾默生环境优化技术有限公司	用于压缩机的注入模制密封件
US9605677B2 (en)	2012-07-23	2017-03-28	Emerson Climate Technologies, Inc.	Anti-wear coatings for scroll compressor wear surfaces
WO2014049137A1 (fr)	2012-09-28	2014-04-03	Saint-Gobain Performance Plastics Pampus Gmbh	Palier à glissement sans entretien pourvu d'une couche de glissement adhésive combinée
CN105492516A (zh) *	2013-03-22	2016-04-13	3M创新有限公司	具有干运转能力的聚合物滑动材料和具有干运转能力的滑环密封件
WO2015136457A1 (fr) *	2014-03-11	2015-09-17	Cave S.R.L.	Palier lisse pour constructions
US9347494B2 (en)	2014-07-15	2016-05-24	Boss Tool Corporation	Guiding element for actuator
US11852194B2 (en) *	2020-12-11	2023-12-26	Saint-Gobain Performance Plastics Corporation	Solenoid low friction bearing liner

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2009
- 2009-04-17 DE DE102009018637A patent/DE102009018637A1/de not_active Withdrawn
2010
- 2010-03-29 EP EP10158124.7A patent/EP2241773B1/fr active Active
- 2010-04-16 CN CN201010163875.5A patent/CN101865212B/zh active Active
- 2010-04-16 US US12/799,043 patent/US20100290726A1/en not_active Abandoned

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WO2003078481A1 (fr)	2002-03-18	2003-09-25	Paul Smith	Polytetrafluoroethylene pouvant etre traite en fusion

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Publication number	Priority date	Publication date	Assignee	Title
US10670101B2 (en)	2015-06-29	2020-06-02	Saint-Gobain Performance Plastics Corporation	Linear motion system

Also Published As

Publication number	Publication date
DE102009018637A1 (de)	2010-10-21
US20100290726A1 (en)	2010-11-18
EP2241773B1 (fr)	2016-07-20
CN101865212B (zh)	2016-04-06
CN101865212A (zh)	2010-10-20
EP2241773A3 (fr)	2013-02-13

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Publication	Publication Date	Title
EP2241773B1 (fr)	2016-07-20	Palier lisse
EP2241597B1 (fr)	2020-03-11	Composé de polymère ainsi que composant fabriqué en utilisant le composé
EP1511624B1 (fr)	2005-12-07	Materiau composite de palier lisse
DE19719858B4 (de)	2004-09-02	Drucklager mit einer Gleitoberfläche
EP0832155B1 (fr)	2008-04-30	Matière de couche de glissement
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DE102013227188A1 (de)	2015-07-02	Selbstschmierende thermoplastische Schichten mit Zusatz von PTFE mit polymodalem Molekulargewicht
WO1997003299A1 (fr)	1997-01-30	Materiau constitutif de paliers lisses et son utilisation
DE102010018328A1 (de)	2011-10-27	Gleitlagerverbundwerkstoff und hieraus hergestelltes Gleitlager
EP2408859B2 (fr)	2016-07-13	Mélange polymère, ainsi que pièces fabriquées par utilisation du mélange
DE69325160T2 (de)	1999-11-04	Polyphenylensulfidharzzusammensetzung und verfahren zu ihrer herstellung
EP4121663A1 (fr)	2023-01-25	Matériau composite de palier lisse et son procédé de production
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DE10225783A1 (de)	2003-12-24	Gleitlagerverbundwerkstoff
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DE102024126721A1 (de)	2026-03-19	Dichtungszusammensetzung und Dichtelement
DE29522175U1 (de)	2000-05-25	Gleitlagerwerkstoff
DD258641A1 (de)	1988-07-27	Verfahren zur herstellung von gleitschichten mit hoher langzeitwirkung
DE102017008733A1 (de)	2018-03-22	Feste, feuerbeständige Polymerzusammensetzung und Anwendung bei elektrischen Kontakten
DE10260585A1 (de)	2004-07-22	Gleitringdichtung
DE102004041477A1 (de)	2006-03-02	Gleitlagerwerkstoff-Verbund aus einem polymeren Matrixwerkstoff

EP2241773A2 - Palier lisse - Google Patents

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